Improvement in boilers for heating purposes



2 SheetsSheet 1.

J. A. MAYNARD.

Steam Heater.

No. "2,824. Patented Mar. 2i, I87L- 2Sh t-Sh x2. 1. A- MAYNARD.

. Steam Heater.

No. 112,824. Patented Mar. 21, i871.

N.PETEI]S. FHOTOLITHUGRAPHER, wAsmNGToN, a C.

timid Shirt JAMES A. MAYNARD, 0F NEWTONVILLE. MASSACHUSETTS.

Letters Patent No. 112,824, dated March 21,1871.

IMPROVEMENT LN BOILERS FOR HEATING PURPOSES.

The Schedule referred to in these Letters Patent and making part of thesame. A

v To all whom it may concern.-

Be it known that 1, JAMES A. MAYNARD, of New tonville, in thccounty ofMiddlesex and State of Massachusetts, have invented certain Improvementsin Boilers for Heating Buildings and for other purposes, of which thefollowing is a full, clear, and exact description, reference being badto the accompanying drawing making part of this specification, inwhich-- Figure 1 is a perspective view of my improved boiler.

Figure 2 is a longitudinal vertical section through the center ofthe's'ame.

Figure 3 is a transverse section through the center of the same.

Figure 4 is a horizontal section on the line a: x of fig. 2. v Myinvention consists in connecting two portions of a boiler by means of aseries of tubes, through which circulates hot water or steam,'thesetubes serving as radiators for heating the air which passes in contactwith their external surfaces; and my invention also consists in thecombination with the above of a circulator or division-plate, which isplaced partially around the furnace within the boiler and extends towithin a short distance of its top and bottom, whereby the water iscaused to circulate continuously through the boiler and'tubes in orderthat'it may become rapidly heated.

To enable'others skilled in the art to understand and use my invention,I will proceed to describe the manner in which I have carried it out.

In the said di-awing- A is the boiler, within the portion a of which isplaced the furnace B, the tides b of which communicate with thesmoke-pipe O.

The portions 0 d e of the boiler are connected together and. to theportion a so as to form a rectangular opening, D", which is crossed bytwo series of tubes h i, the extremities of those it opening into theportions 0 0, while the extremities of those 1 open into the portions 0.d of the boiler.

These tubes are heated by the hot water and steam which circulatethrough them, and serve as radiators to heat the air which passes upthrough the rectangulfar opening 1) into contact with their exterior suraces.

The interior or each portion a c d e of the boiler is provided withvertical tubes k, open at each end 5 6.

These tubes are heated by the hot water and steam withihthe boiler, andserve as,radiators for heating the air which passes up through them incontact with their inner surfaces.

The air, after being heated by passing up through the rectangularopening D andtnbes kyenters a chamber, not shown, surrounding theboiler, from which it is conveyed by suitable pipes to any part of thebuildiing to be heated.

In order to facilitate and insure the desired circulation of the waterwithin and through the boiler and tubes h i, aplate'or circulator, E, ismade to extend partially around the furnace B from 7 to 8, see fig. 4,and to within a sho'rtdistance of the top and bottom of the boiler,leaving passages 9 and 10, by whichconst-ruction the cold water at thebottom of the pormay be used to generate steam for various purposes.

Claims.

1. A boiler composed of two or more portions, connected by the tubes hor i, which serve as radiators for heating the air passing incontactwith their external surfaces, as and for the purpose described.

2. The circulator E, in combination with the furnaceB and a boilerprovided with radiating-tubes h or 1 operating substantially as setforth.

3. The combination of the portipns a c d e with their radiating-tubes k,the radiating-tubes h t, furuace B, and circulator E, operatingsubstantially in the manner and for the purpose described. I

Witness my hand this 20th day of December, A. D. 1870.

JAS. A. MAYNARD.

Witnesses:

N. W. STEARNS, W. J. CAMBRIDGE.

